Debouncing button or switch inputs on microcontrollers ... some other capabilities to inputs you might want to look at this interrupt service routine (ISR) method from [Lee] aka [stockvu].

I made this Arduino 8 bit binary led counter as a solution for ... debounce the button and increase the value of presses each time we press the button (when we trigger the interrupt from the setup()).

For this project I am using the Arduino Mega 2560. First ... interaction and setting of the system is based on an alphanumeric 16×2 LCD display and three buttons to control a simple display menu.

a desk-mounted panic button is undoubtedly cool, and it makes for a great DIY Arduino project. You'll need a prepaid SIM card, an Arduino, a GPRS shield, and a few other odds and ends. Luckily ...